Dengue hemorrhagic fever is a mosquito-borne disease has spread the fastest speed in the world. According to estimates of the World Health Organization, there are about 96 million every year people suffering from the disease, with 500,000 severe cases require hospitalization and approximately 12,500 deaths. Dengue existed in Vietnam for decades, each year have 50,000-100,000 cases. Mosquito-borne disease and no specific treatment. Preventive vaccines are being studied and tested. Dengue fever caused by dengue virus type 4 disease is denoted by D1, D2, D3, D4. Because immunity is formed only after the disease specificity of each tube so a person can get sick 2-3 times.
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